A high-quality teaser trailer for "Birds of Prey" has leaked online and it shows the return of Margot Robbie as the lovable and naive Harley Quinn.

We're not going to link to it here, but it's not difficult to find if you search for the "Birds of Prey" trailer on YouTube or Twitter.

The 34-second teaser for "Birds of Prey" is only supposed to play in theaters, Insider confirmed. It was heavily reported that a trailer for the upcoming Warner Bros. movie would be attached to "It Chapter Two."

Warner Bros. recently did the same marketing tactic with a theater-only teaser for Christopher Nolan's next movie, "Tenet." However, what's curious about the "Birds of Prey" online leak is that it's not a shaky fan-filmed version seen in theaters and Warner Bros. isn't having the videos scrubbed from social media and YouTube. WB was pretty quick to take down any filmed trailers of "Tenet" from the web.

If you don't plan on going to theaters this weekend and miss the trailer, we have you covered. And even if you do watch the short teaser online and are confused, here's what you should know.

What happens in the short teaser: We're introduced to some of the main characters and the film's villain.

Ewan McGregor is going to play Black Mask, a classic Batman villain. Here's how he looks in a Batman video game. The trailer shows Ewan McGregor looking very much like a human.
DC/WB Interactive

The teaser starts out appearing to be a trailer for "It Chapter Two." Pennywise's iconic red balloons float slowly up the screen as the eerie overture of "It" starts up.

A female silhouette enters the frame, walking closer to the camera swinging an object in her right hand. The woman swings a mallet at the balloons popping a few of them and Harley Quinn (Margot Robbie) comes into view. She has a different hairstyle than in 2016's "Suicide Squad" and is wearing a new outfit. She has a pink tube top on with a jumper that's unzipped down the middle. It's gold on the left side and a shade of turquoise on the right.

"I'm so f---ing over clowns," Quinn tells the audience.

The teaser then flashes through a myriad of scenes. We see someone on the back of a motorcycle, followed by quick cut scenes of Mary Elizabeth Winstead as the Huntress, Jurnee Smollett-Bell as Black Canary, and Ewan McGregor as the film's villainous Black Mask. Harley is then seen throwing her mallet at someone in a zebra mask and there's another big fight sequence going on.

It culminates on a closeup shot of Harley sitting in a car with what appear to be two pets. She's eating as she gives a wink. The trailer ends with the logo for the film.

The big takeaways: The introduction to a classic Batman villain, three Batman heroes, and Harley's pets.

Harley Quinn is shedding her baggage.
Warner Bros.

If a lot of the teaser flashed by too fast for you, these are the things to pay attention to.

Ewan McGregor plays a gangster in the film called Black Mask. In the comics, video games, and animated series, the villain wears a black-shaped skull mask and wears a white suit. In the trailer, McGregor looks very much like himself but is seen in a white suit. We may very well see the villain's origin story.

There are a few versions of Huntress in the comics, but the one we'll see in "Birds of Prey" is Helena Bertinelli. That character is a daughter of a Gotham crime boss, which could come into play in this film if we're already dealing with Black Mask. Smollet-Bell's Black Canary is a vigilante who's famous for her powerful shrieking cry. Renee Montoya, a member of the Gotham police force, is also expected to team up with the women.

Something you may have missed near the end of the teaser are what appear to be two furry and spotted canines alongside Harley in a vehicle. We're willing to bet those aren't dogs, but Harley's pet hyenas that were introduced in "Batman: The Animated Series."

Harley appeared to have some spotted friends sitting beside her in a vehicle. Could they have been pet hyenas?
Warner Bros.

What exactly is "Birds of Prey"?

If you're not familiar with the DC universe, you may be wondering why this movie's called "Birds of Prey" instead of something that has to do with Harley Quinn. You may even be wondering what the "Birds of Prey" are.

Great question.

The title is actually the name of a female superhero group that's based in Gotham City led by Black Canary, Huntress, and Batgirl. WB, which would later become The CW, once aired a show centered around the girl group before the Arrowverse launched.

Wait a minute. Batgirl's in this group?

Yes, but just in the comics. As far as we know, the character isn't supposed to be in this film. It looks like Harley Quinn, who was never a part of the Birds of Prey in the comics, is joining the group instead. There may be a good reason for that.

The meaning behind the movie's film title: Harley Quinn is breaking free from the Joker and coming into her own.

Harley rocked a completely different look that suggested she was completely devoted to the Joker.
Warner Bros.

In 2016's "Suicide Squad," Harley Quinn was a lovesick puppy who was waiting to be reunited with the Joker.

But as the film demonstrated, the duo has a toxic, abusive relationship. The same goes for the comics. The film's extended title, "the Fantabulous Emancipation of One Harley Quinn," suggests that Harley is letting go of the Joker and is moving on. That's probably the right move for Harley in a post #MeToo world.

2019 Harley has no time for an abusive man. A look at her mini-makeover shows that she shed the classic harlequin costume and "Daddy's Lil' Monster" shirt that associated her as one of Joker's comrades.

Harley may move on from the Joker by teaming up with the actual Birds of Prey group. Joining the Suicide Squad group of characters in the 2016 film gave Harley a taste of what it's like to be a good guy and save the world. She may have decided that wasn't so bad.

In short, Harley doesn't need a man to be happy and we'll likely see her grow and come into her own as she figures out how to exist independently of the Clown Prince of Crime.

Don't be surprised if a longer, full trailer debuts in the next month with the release of "Joker."